I have my helpdesk staff export their weekly reports to me in PDF format to turn in. Occasionally they'll get "Failed to load PDF document" when they choose PDF as their exported format. CSV and XLS work fine though. Does anyone have an idea as to why this happens? Thanks!

Recently i solved this type of question by updating the Adobe reader to 10.1 and also Adobe writer update can solve this. You should install the latest version of adobe reader / writer it may solve this. Also if nothing works then you should change the browser to mozila firefox or chrome for just testing.